NonStop S-Series Hardware Installation and FastPath Guide (G06.26+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529876-001
Glossary-116
THD
THD. See total harmonic distortion (THD).
three point fall of potential measurement method. The measurement of a grounding
electrode (such as a ground rod) where ground resistance is measured with respect to
two other points. The ratio of the measurements determines the resistance of the
grounding electrode.
TIM. See HP NonStop™ Technical Library (NTL).
time factor (TF). A number assigned to a line, path, or route to indicate its efficiency in
transporting data. The lower the time factor, the more efficient the line, path, or route.
See also surge.
TLB. See translation lookaside buffer (TLB).
TMF. See HP NonStop™ Transaction Management Facility (TMF).
TNS. Refers to fault-tolerant HP computers that support the HP NonStop™ operating
system and are based on microcoded complex instruction-set computing (CISC)
technology. TNS systems run the TNS instruction set. Contrast with TNS/R.
TNS accelerated mode. A TNS emulation environment on a TNS/R system in which
accelerated TNS object files are run. TNS instructions have been previously translated
into optimized sequences of MIPS instructions. TNS accelerated mode runs much
faster than TNS interpreted mode. Accelerated or interpreted TNS object code cannot
be mixed with or called by native mode object code.Contrast with TNS/R native mode.
TNS C compiler. The C compiler that generates TNS object files. Contrast with TNS/R
native C compiler.
TNS code segment. One of up to 32 128-kilobyte areas of TNS object code within a TNS
code space. Each segment contains the TNS instructions for up to 510 complete
routines. Each TNS code segment contains its own procedure entry-point (PEP) table
and external entry-point (XEP) table
. It can also contain read-only data.
TNS code segment identifier. A seven-bit value in which the most significant two bits
encode a code space (user code, user library, system code, or system library) and the
five remaining bits encode a code segment index in the range 0 through 31.
TNS code segment index. A value in the range 0 through 31 that indexes a code segment
within the current user code, user library, system code, or system library space. This
value can be encoded in five bits.
TNS code space. One of four addressable collections of TNS object code in a TNS
process. They are User Code (UC), User Library (UL), System Code (SC), and System
Library (SL). UC and UL exist on a per-process basis. SC and SL exist on a per-node
basis.